Method of making electric condensers.



PATENTED JAN. 21, 1908.

F. s. KOCH; METHOD OF MAKING ELECTRIC GONDENSERS.

APPLICATION FILED AUG. 15.1904.

2 sums-sum 1.

Ind/b21700 PATBNTED JAN. 21, 1908. F.S.KOGH.

METHOD OF MAKING ELECTRIC GONDENSERS.

APPLICATION FILED AUG. 15. 1904.

2 SHEETS-SHEET 2.

FRANK'S.

UNIT -swarms PATENT. OFFICE.

minor) or 11 m ELECTRIC commnsnn's.

' Specification of Letters Patent.

- Applioationflled Augnstlfi. 1904- Serial No. 220.712.

Patented Jan.21, 190s.

To all whom it may concern." Be it known that I, FRANK S. Koon, =acitizen of the United States, residin in Chicago, county of Cook, andState of Illinois, have invented certain new and useful Improvements inthe Method of'Making Electric Condensers, of which the following is aspecificati'on. 4

It is often desired to-utilize certain space 1 in and about electricalinstruments and apparatus for the condensers that are associated withsaid instruments or-app'aratus, and to so construct said condensers thatthey shall have amaximum of insulation for the space 1.5 in which theyare required to be located and for the capacity they are reghuired tohave. I accomplish this result, whi is one object of my in vention, byproviding means where by for a given size of condenser I utilize the '20eatestnumber of turns of paper and tin il or other dielectric and plateswhich can -be placed in such space and which thereby increases theinsulation and. maintains the capacity. a

In carryin' out my invention I first provide a sultab e tin box or othercasing and placejn the box through a suitable funnel or e uivalentnaeans, a, condenser, preferably fo ed; then boil the same in parafiinor other suitableinsulating material and compress the box to its normalsize or the size desired b means of a suitable tool or press which t usbrings the completed condenser tothe required size The folded condenserher from strips of paper and tin foil into a suitable flattened oroblong roll, and is there placed within the box as after folded andabove stated.

Other obj ects of the invention are to so improve the methods ofmanufacture of condensers and the'article itself as'to cheapen the costof the sameand increase the efiicienc throughout. St' other objects andadvantages will appear from the detailed description and claims to whichreference is hereby made-for a complete and full disclosure of the same.The improvements areillustrated in the accompanying drawing in which thesame reference characters are used throughout to designate like parts,and in which:

' Figure 1 is a side view of the apparatus employed for. rolling thecondensers; F 2 is a 55 side view of the' form upon which lie box; Fig.

may be rolled or Wrapped in the usual inan- COD.-

densers are adapted to be wound; 3 is an endv view of the same; 4 is anend view of the roll after it'is taken from the form; Fig. 5 is a viewof the paraffin bath to which "the condensers are subjected; Fig. 6 isaperxoonyoronroAeo; ILLINOIS, ASSIGNOR fro KELLOGG swrroHBoAiu) & SUPPLYCOMPANY, or-on oaeo, ILLINOIS, A CORPORATION "OF ILLINOIS.

s'pective view of the roll. after'it is folded Fig. 7 is a similar viewof the'box or casing; Fig. Sis also a perspective view of the funnelby.m'eans of which the folded roll is inserted in-the 'casin Fig. 9 is asimilar view of the insulating-b ock placed in the bottom of the placedwithin the box or casing Fig. 11 isa, side view of a tool or press bymeans of which the boxes containing the condensers are compressedto'normal size after having been subjected to the paraffin bath; Fig. 12is a cross section of said press; Fig. 13 is an end view 10 shows thefolded conde'nser of the condenser after it hasbee compressed and thewire terminals are attached; Fig. 14 is a view of the box 'containin thecondenser after the open end has been ed with paraffin and the fillingstrip being applied, and Fig. 15 is a perspective view of the completedcondenser, showing the cap or cover applied to the box or casin and theterminals of the condenser mounte upon and insulated from the said cap.v

Referrin to Fig. 1, suitable rolls 2 of paper or other die ectric of thedesired width are rotatably supported upon a frame and betweenthem issimilarly situated a corresponding roll '3 of tin foil or other materialforming the plates of the condensers, the width of the foil being slihtly less than that of the paperas indicate in Fig. 2. These strips ofpaper and the tinfoil are carried up over the guiding rolls 5 at theupper part of the frame and thence'down over another roll 6 totherolling form 7. Two :such sets of rolls are employed since the tin.foilfrom the rolls 3 form the two plates of the, condenser. When thehandie 8 of the form 7' is rotated therefore the strips of material aredrawn oii'from said rolls and form an oblong or flattened roll 9, asshownin Fig. 3; the plates of the condenser being between two strips ofpaper, al-

- though one Intermediate strip only might be employed. The terminals10, consisting of thin metal strips, preferablyof tinned copper ribbon,are sli ped into position as the rolls are being ma e, each in contactwith one of the strips of tin foil, Plain rice paper has been foundsatisfactory for the dielectric. As indicated in Fig. 2-,-vv one or morerolls 9.

.sni'al er en may be formed at the same time. Fig. 4 in'.- dicates theroll after it is removed from the f0rm 7 and before folding. Other formsof rolls may obviously be used if preferred;

After the condenser has been rolled it' is preferablpthough notnecessarily folded. into U shape (as shown in Fig. 6) or in any otherdesired manner, and is then placed within the box or casing -11, asshown-l'n'ffig. 7, this casing being preferably of tin and having'oneopen end; it is of the size desired for the comp ted condenser. In Orderto more easily insert the. foldedcondenseragfjunnel 12, a's'shown inFig. 8, is -p'ro,vided ,said. funnel bei i also refe'rably formed of tinwith the d of'such size as toconveniently' but closely fit Within theopen end ofthebox 11. Before inserting the condehseror nel a strip 13 ofsuitable insulatin material, such as red'fiber, is placed'in the;ottomof the box 11 to prevent'the plates ofthe con- "denser from cominginto contact. with the of the act that the said :than the strips ofpaper.

,1 end of the box and thusbeing'short-circuitd,

althou h this'ma be dispensed with in view plates are narrower Afterhaving inserted the plate 13 andthe funnel 12 into-casing 11, thepreferably-folded condenser, as shown in Fi 6, is inserted through theflaring mouth 0 the funnel by means of which it is compressed as it isslipped into the .box.. v Owing to the flexible nature of the sides ofthe box and the factthat the folded-condenser is larger, thebo'xas'sumes a bulging form as shown in Fig. 10 when, the,

' roll has-been placed'therein. The nextfstep steam-heated jacket 15,and in which both in the'process of'forming the condenser is to submitit toa bath of molten .paraflin orother suitable insulating substance. Abath :14, suitable for the urpose, is-indicated in Fig. 5, the parafiineing preferably main- ."tained at a temperature of about 240 to 260degrees Fahre eit by means of a suitable the condensers in their boxesare allowed to remain for from three 'to five hours until the rolls arethoroughly impregnated with the paraffin and themoisture and airjaredriven As shown, a plurality of saidoondensers, ma be boiled at onetime, a suitable crate or rac 16 being. provided by means'of which theymay be readily-placed in and removed 4 fromthe said bath. Inthis boilinopera-- the para tion all .0 en space in the box is fil ed with and the.abso tion of the boillng materialby theroll itse f results inswellingthe folded roll to greater size than when first placed in thebox in its drficondition;

and, thus still further bulging e cases or boxes -1 1.

After the condensers have been boiled j the paraffin for the 1 reps!length of time they are removed and}; aced in a suitable press or tool,such as shown in Fig. 11, and are reduced by pressure to their normalsize. This device" which have shown consists efa zlower bar or sill18'having ost's 18i secured thereto, one at each end, with, the sidebars postsahd securedto the si esthereolf. The oxes orjcans'll are adated to bejplaced in can, the upper faces of said blocks'being taperedfrom the middle toward each en" (as shown in Fig;'12') to facilitatedraining off 19 extending between'the u perends-ofsaid this press. one bone an since each must be j a com ressed to t e same size a loose block21 of t e proper widthis placed beneath each .the paraffin that is sueezedout of thecans Y when pressure is ap P 17. pro ecting js'li ht yabove the sill18 is seied t0fthem;; A strip- -cur,edtoone: s1 e thereofand serves as a guide'when'rapidly'placing the said blocks in position..A top spacing 'block'21"' of the sameor. the-desired width is thenplaced above the can asindicated in Figs. 11 and 12 A small plate ofsheet steel. 21 reachin from thesill 18' to a pointbetween the bloc s21" is placed between the adjacent condensers. A slidableblock 21islocated-atthe end of the number that it is desired to compress and ascrew 22,p1ovided'with a hand wheel 23,

threading through the end post 18' serves to u press said block 21against the rowfof 'condensers. As ressure is'ap lied the. cans-arebrought to t e right size y means of the plates 21? which are properly saced at their upper and lower ends by'the b ocks 21. and. 21.- Toprevent themass 1'isin'g-while, compressed loops 20 are provided upcn'eac end postjaiid a bar PPe there through'to holdthem downi.

After subject'n the'condensers to the parioo aifi'n bath suitabe-jterminal strips 26,-c"onsisting' of wires covered with insulation are'soldered'to-said tinnedribbons -1 0,'which are thenfolded or curledover on top, of 'thecon denser as shown in Fig. '13,- with theirbared gor stripped ends projectingoutwardly; The ends of; the cans or boxes arethen filled i'n withmore parafiin or a suitable sealing Wax which fillsin and around the wires 26 'to per N manently seal the end of thebox-and tofo'rm,

a". more or less rigid support for the" wires'26.

A, suitable block 27' similar .to=1bl'ock .13 ox- *cept that itisprotided withapertures28 forthe passage of terminal wires 26, is

placed. in theopenend of the hex upon the araffin'; A-cap'; 29,preferablyof or 1 her, is -then placed upon theboxll to close its openend and is soldered thereto; The

cap carries an insulating plate .30 upon which are mounted suitableterminal metallic clips I of the box is com letely filled and presents asolid mass, there eing no waste space inside since it is unnecessary'toprovide a clearance as in the case where the condenser is first {)ormedand then placed within the can or It is apparent that various means andmethods differing in matters of detail from that described may beemployed for accom- Elishin the objects of my Improvements;

ence do not" desire to be'limited in all respects to such as are hereinset forth.

' Having thus described my invention what I claim is.

1. The process of makinga condenser, consisting of suitably assemblingthe plates and dielectric. material, placing said assembled elements ina retaining can or casing, immersing said can and its contents inparaffin or wax at a high temperature to thereby impregnate thedielectric material with the paraffin, and to permit the paraffin tofill all the crevices and corners of the can, whereby the.c0ntents ofthe can when cold is .a solid mass, and subjecting the can anditscontents to heavy pressure to remove the surplus paraifin and bring theplates into intimate in ductive relation, substantially as described.

2. The process of making condensers conelectric, placing the same in aninclosing case,

submerglng the case and parts in a molten dielectric material, andsubjecting the case and parts to pressure, substantially as described.

3. The process of making condensers which consists in assembling theconductors and dielectric, forcing the assembled parts into an inclosingcase, submerging the case and parts in a molten dielectric material,removing the case and contents and subjecting the whole to pressure,substantially as described.

4. The process of making condensers which consists in assembling ,theconductors and dielectric, forcing the assembled parts into an inclosingcase, submerging the case and parts in a molten dielectric, material,removing the case and contents and subjecting the whole to pressure, andallowing the dielectric material to harden under pressure, substantiallyas described.

In witness whereof, I hereunto subscribe my name in the presence of twowitnesses.

FRANK S. KOCH.

Witnesses:

ROBERT LEWIS AMES, EDITH F. GRIER.

